JP5251625B2

JP5251625B2 - Bending machine

Info

Publication number: JP5251625B2
Application number: JP2009057466A
Authority: JP
Inventors: 史夫新土; 久生宮田; 雅貴鈴木; 正樹斉藤; 吉宏岡崎
Original assignee: Aisin AW Co Ltd
Current assignee: Aisin AW Co Ltd
Priority date: 2009-03-11
Filing date: 2009-03-11
Publication date: 2013-07-31
Anticipated expiration: 2029-03-11
Also published as: JP2010207871A

Description

本発明は、例えば、回転電機用の巻線（マグネットワイヤ）を構成する断面円形或は矩形の金属線（例えば平角線）や、その他、棒材、パイプ材、板材等の所定の素材に曲げ加工を施す曲げ加工装置に係り、詳しくは、前記素材の複数個所を折り曲げる加工を、素材の引き込みを生じることなく同時に行え、加工精度を良好にできる曲げ加工装置に関する。 The present invention, for example, bends into a predetermined material such as a circular or rectangular metal wire (for example, a flat wire) constituting a winding (magnet wire) for a rotating electrical machine, or a bar material, pipe material, plate material, or the like. More particularly, the present invention relates to a bending apparatus that can perform a process of bending a plurality of portions of the material at the same time without causing the material to be pulled in, and can improve processing accuracy.

一般に、誘導モータ、直流モータ（ジェネレータを含む）等の回転電機は、産業用又は車輌用の動力源として広く用いられており、そのステータのコイルのレイアウトは、比出力が高い分布巻きが多用されている。近時、ハイブリット駆動車輌及び電気自動車に用いられるモータとして、出力／寸法要求等からスロットの占積率の高い平角線をマグネットワイヤとして用いることが提案されている。 In general, rotating electrical machines such as induction motors and direct current motors (including generators) are widely used as power sources for industrial or vehicle use, and distributed winding with high specific output is often used for the layout of the stator coils. ing. Recently, as a motor used in a hybrid drive vehicle and an electric vehicle, it has been proposed to use a rectangular wire having a high slot space factor as a magnet wire because of output / size requirements and the like.

上述のような回転電機に使用されるマグネットワイヤは、複数個所を折り曲げることによりコイルを構成するが、従来、マグネットワイヤ等の素材の曲げ加工は、一方向にのみ曲げ加工が可能な曲げ加工装置により、素材を治具に引き込みつつ行っていた（特許文献１参照）。 The magnet wire used in the rotating electric machine as described above forms a coil by bending a plurality of portions. Conventionally, bending processing of a material such as a magnet wire can be performed only in one direction. Thus, the material was drawn into the jig (see Patent Document 1).

また、マグネットワイヤ等の素材に２個所の曲げ加工を同時に行う場合には、素材の２個所をクランプで固定し、素材を引っ張りつつ曲げていた（特許文献２参照）。 In addition, when two places of bending work are simultaneously performed on a material such as a magnet wire, the two places of the material are fixed with clamps and bent while pulling the material (see Patent Document 2).

特開２００４−１０４８４１号公報JP 2004-104841 A 実開昭５５−１２２９２４号公報Japanese Utility Model Publication No. 55-122924

上述の特許文献１に記載された構造の場合、素材の複数個所に曲げ加工を行うためには、素材の先頭から曲げ加工をし、その後、素材をずらして再度加工するという作業を、順次繰り返す必要がある。このため、加工時間が長くなることが避けられない。また、曲げ加工時に素材の引き込みが生じるため、素材の複数個所を同時に曲げる加工を行えない。 In the case of the structure described in Patent Document 1 described above, in order to perform bending at a plurality of locations of the material, the operation of bending from the top of the material and then processing again after shifting the material is sequentially repeated. There is a need. For this reason, it is inevitable that the processing time becomes long. In addition, since the material is pulled in during the bending process, it is not possible to perform a process of bending a plurality of parts of the material simultaneously.

一方、特許文献２に記載された構造の場合、素材の２個所に同時に曲げ加工を施しているが、素材が引き込みを生じないように、素材を曲げるための両クランプが離れる方向に大きなバックテンション（引っ張り力）を作用する必要がある。この為、曲げ加工の際に、素材の寸法管理が難しく、正確な曲げ加工を行いにくい。 On the other hand, in the case of the structure described in Patent Document 2, bending is simultaneously applied to two parts of the material, but a large back tension is applied in the direction in which both clamps for bending the material are separated so that the material does not pull in. (Tensile force) must be applied. For this reason, it is difficult to manage the dimensions of the material during bending, and it is difficult to perform accurate bending.

そこで、本発明は、素材の複数個所を折り曲げる加工を、素材の引き込みを生じることなく同時に行え、加工精度を良好にできる曲げ加工装置を提供することを目的とするものである。 Accordingly, an object of the present invention is to provide a bending apparatus that can perform a process of bending a plurality of portions of a material at the same time without causing the material to be pulled in and can improve the processing accuracy.

本発明は、所定の素材（Ｗ）に複数個所の曲げ加工を施す曲げ加工装置（１２）において、
回動軸（１５）を中心に回動自在に連結される第一の治具（１３）及び第二の治具（１４）と、
前記第一の治具（１３）と前記第二の治具（１４）との回動に連動して、それぞれの支点（Ｐ，Ｑ）を中心として回動し、前記素材（Ｗ）を曲げる複数の回動曲げ部（１６，１７）と、を備え、
前記第一の治具（１３）は、回動方向と反対側に前記素材（Ｗ）の変位を抑える抑え部（１８）と、前記両治具（１３，１４）の回動により前記素材（Ｗ）を曲げる治具側曲げ部（１９）と、を有し、
前記第二の治具（１４）は、回動方向と反対側に前記素材（Ｗ）の変位を抑える抑え部（１８）を有し、
前記各回動曲げ部（１６，１７）のそれぞれの支点（Ｐ，Ｑ）及び前記治具側曲げ部（１９）を、前記素材（Ｗ）に複数個所の曲げ加工を施す際に、該素材（Ｗ）が前記両治具（１３，１４）に対し変位しないように、前記回動軸（１５）からそれぞれオフセットさせて配置し、
前記第一の治具（１３）と前記第二の治具（１４）との回動に連動させて、前記各回動曲げ部（１６，１７）を回動させることにより、前記素材（Ｗ）の複数個所に同時に曲げ加工を施すことを特徴とするものである。 The present invention provides a bending apparatus (12) for bending a predetermined material (W) at a plurality of locations,
A first jig (13) and a second jig (14) connected to be rotatable about a rotation shaft (15);
In conjunction with the rotation of the first jig (13) and the second jig (14), the first jig (13) rotates about each fulcrum (P, Q) to bend the material (W). A plurality of rotational bending portions (16, 17),
The first jig (13) includes a holding portion (18) that suppresses displacement of the material (W) on the side opposite to the rotation direction, and rotation of the two jigs (13, 14). W) a jig side bending portion (19) for bending,
Said 2nd jig | tool (14) has the holding | suppressing part (18) which suppresses the displacement of the said raw material (W) on the opposite side to a rotation direction,
When bending each of the fulcrums (P, Q) and the jig-side bending portion (19) of each of the rotating bending portions (16, 17) on the material (W), the material (W W) are arranged offset from the pivot shaft (15) so that they are not displaced with respect to both the jigs (13, 14),
The material (W) is rotated by rotating the rotating bending portions (16, 17) in conjunction with the rotation of the first jig (13) and the second jig (14). It is characterized by bending at a plurality of locations simultaneously.

前記回動軸（１５）の回動中心（Ｏ）は、
前記治具側曲げ部（１９）と前記素材（Ｗ）とが、曲げ加工前と曲げ加工後とで当接している同じ点と、該治具側曲げ部（１９）の中心とを通る仮想線が、該素材（Ｗ）の中立線（Ｎ）と交差する点を始点（Ｒ）とし、
前記始点（Ｒ）から、曲げ加工の際に前記治具側曲げ部（１９）及び前記各回動曲げ部（１６，１７）により曲げられる部分を含む、前記素材（Ｗ）の中立線（Ｎ）の長さが、該素材（Ｗ）の曲げ加工前の状態と曲げ加工後の状態とで同じである長さ離れた、該中立線（Ｎ）上の位置を基準点（Ｏ１，Ｏ２）とした場合に、
該基準点（Ｏ１，Ｏ２）までの距離が、曲げ加工前と曲げ加工後とで同じで、
前記回動中心（Ｏ）と曲げ加工前の基準点（Ｏ１）とを結ぶ直線（Ｏ−Ｏ１）と、該回動中心（Ｏ）と曲げ加工後の基準点（Ｏ２）とを結ぶ直線（Ｏ−Ｏ２）とが成す角度が、前記第一の治具（１３）と前記第二の治具（１４）との回動角度に応じた角度となるように定める。 The rotation center (O) of the rotation shaft (15) is:
A hypothesis passing through the same point where the jig-side bending portion (19) and the material (W) are in contact before and after bending and the center of the jig-side bending portion (19). The point where the line intersects the neutral line (N) of the material (W) is the starting point (R),
A neutral line (N) of the material (W) including a portion bent from the starting point (R) by the jig side bending portion (19) and the rotating bending portions (16, 17) during bending. The positions on the neutral line (N) that are the same length in the state before bending and the state after bending of the material (W) are defined as reference points (O1, O2). If
The distance to the reference point (O1, O2) is the same before and after bending,
A straight line (O-O1) connecting the rotation center (O) and the reference point (O1) before bending, and a straight line connecting the rotation center (O) and the reference point (O2) after bending ( The angle formed by (O-O2) is determined to be an angle corresponding to the rotation angle between the first jig (13) and the second jig (14).

前記各回動曲げ部（１６，１７）のそれぞれの支点（Ｐ，Ｑ）は、
前記治具側曲げ部（１９）と前記素材（Ｗ）とが、曲げ加工前と曲げ加工後とで当接している同じ点と、該治具側曲げ部（１９）の中心とを通る仮想線が、該素材（Ｗ）の中立線（Ｎ）と交差する点を始点（Ｒ）とし、
前記各回動曲げ部（１６，１７）と前記素材（Ｗ）とが、曲げ加工前と曲げ加工後とで当接している同じ点と、該回動曲げ部（１６，１７）の中心とを通る仮想線が、該素材（Ｗ）の中立線（Ｎ）と交差するそれぞれの点を終点（Ｐ１，Ｐ２，Ｑ１，Ｑ２）とした場合に、
前記始点（Ｒ）と終点（Ｐ１，Ｐ２，Ｑ１，Ｑ２）との間の中立線（Ｎ）の長さが、曲げ加工前と曲げ加工後とで同じとなるように、前記各回動曲げ部（１６，１７）がそれぞれ配置されるように定める。 Each fulcrum (P, Q) of each of the rotating bent portions (16, 17) is:
A hypothesis passing through the same point where the jig-side bending portion (19) and the material (W) are in contact before and after bending and the center of the jig-side bending portion (19). The point where the line intersects the neutral line (N) of the material (W) is the starting point (R),
The same point that each of the rotating bent portions (16, 17) and the material (W) are in contact before and after the bending and the center of the rotating bent portions (16, 17). When the imaginary line that passes through each point that intersects the neutral line (N) of the material (W) is the end point (P1, P2, Q1, Q2),
Each of the rotating bent portions is such that the length of the neutral line (N) between the start point (R) and the end point (P1, P2, Q1, Q2) is the same before and after the bending process. (16, 17) are determined to be arranged.

前記終点（Ｐ１，Ｐ２，Ｑ１，Ｑ２）は、曲げ加工後に前記各回動曲げ部（１６，１７）によりそれぞれ曲げられた素材（Ｗ）の各曲げ部分の、それぞれ中立線（Ｎ）上の中央とする。 The end points (P1, P2, Q1, Q2) are the centers on the neutral lines (N) of the respective bent portions of the material (W) bent by the rotary bending portions (16, 17) after bending. And

前記回動軸（１５）の軸方向にそれぞれ重ねて配置され、該回動軸（１５）から偏心した位置を支点（Ｐ，Ｑ）として回転する複数の回転部材（２１，２２）を備え、
前記各回転部材（２１，２２）は、それぞれ前記回動曲げ部（１６，１７）を有し、前記第一の治具（１３）と前記第二の治具（１４）との回動と連動して、それぞれの支点（Ｐ，Ｑ）を中心に回転可能に互いに係合されている。 A plurality of rotating members (21, 22) that are arranged to overlap each other in the axial direction of the rotating shaft (15) and rotate with the position eccentric from the rotating shaft (15) as fulcrums (P, Q);
Each of the rotating members (21, 22) has the rotating bending portion (16, 17), respectively, and the rotation of the first jig (13) and the second jig (14). In conjunction with each other, they are engaged with each other so as to be rotatable around their respective fulcrums (P, Q).

前記素材（Ｗ）の曲げ個所が３個所であって、
前記第一の治具（１３）と前記第二の治具（１４）とは、該第一の治具（１３）に設けた回動軸（１５）と同心の第一の円筒部（２４）に、該第二の治具（１４）に設けた回動軸（１５）と同心の円孔（２５）を嵌合することにより回動自在に連結され、
前記第一の治具（１３）は、前記第一の円筒部（２４）に互いの中心軸が偏心した第二の円筒部（２６）及び第三の円筒部（２７）を軸方向に重ねて配置し、
前記各回転部材である第一の回転部材（２１）及び第二の回転部材（２２）は、それぞれに設けた前記各回動曲げ部（１６，１７）の支点（Ｐ，Ｑ）と同心の円孔（２８ａ，２８ｂ）を、前記第二の円筒部（２６）及び第三の円筒部（２７）に嵌合することにより、それぞれ、該第二の円筒部（２６）及び第三の円筒部（２７）に回転自在に支持され、
前記第二の治具（１４）及び前記第一の回転部材（２１）は、それぞれ軸方向に突出する突起部（２９ａ、２９ｂ）を有し、
前記第一の回転部材（２１）及び第二の回転部材（２２）は、それぞれ軸方向に凹み或は貫通し周方向に対し傾斜した方向に長い凹溝或は長孔（３０ａ，３０ｂ）を有し、
前記各突起部（２９ａ、２９ｂ）を前記凹溝或は長孔（３０ａ，３０ｂ）に係合することにより、前記第一の治具（１３）と前記第二の治具（１４）との回動に連動して、前記第一の回転部材（２１）及び前記第二の回転部材（２２）を回転させる。 The material (W) has three bending points,
Said 1st jig | tool (13) and said 2nd jig | tool (14) are the 1st cylindrical parts (24) concentric with the rotating shaft (15) provided in this 1st jig | tool (13). ) And a circular hole (25) concentric with the rotation shaft (15) provided in the second jig (14), and is rotatably connected.
In the first jig (13), a second cylindrical portion (26) and a third cylindrical portion (27) whose central axes are eccentric are overlapped with the first cylindrical portion (24) in the axial direction. And place
The first rotating member (21) and the second rotating member (22), which are the rotating members, are circles concentric with fulcrums (P, Q) of the rotating bending portions (16, 17) provided on the rotating members (21, 22). By fitting the holes (28a, 28b) into the second cylindrical part (26) and the third cylindrical part (27), the second cylindrical part (26) and the third cylindrical part, respectively. (27) is rotatably supported,
The second jig (14) and the first rotating member (21) each have a protruding portion (29a, 29b) protruding in the axial direction,
Each of the first rotating member (21) and the second rotating member (22) is recessed or penetrated in the axial direction and has long grooves or elongated holes (30a, 30b) in a direction inclined with respect to the circumferential direction. Have
By engaging the protrusions (29a, 29b) with the concave grooves or elongated holes (30a, 30b), the first jig (13) and the second jig (14) In conjunction with the rotation, the first rotating member (21) and the second rotating member (22) are rotated.

前記第二の回転部材（２２）は、前記第一の回転部材（２１）と該第二の回転部材（２２）との相対的な回動量よりも大きい周方向長さの切り欠き（３１）を有し、前記第一の回転部材（２１）に設けた回動曲げ部（１７）を前記切り欠き（３１）内に配置する。 The second rotating member (22) has a notch (31) having a circumferential length greater than the relative rotational amount of the first rotating member (21) and the second rotating member (22). And a rotating bending portion (17) provided on the first rotating member (21) is disposed in the notch (31).

前記所定の素材（Ｗ）が、回転電機のコイルの巻線を構成する、断面矩形状の平角線からなる。 The predetermined material (W) is formed of a rectangular wire having a rectangular cross section that constitutes a winding of a coil of a rotating electrical machine.

なお、上記カッコ内の符号は、図面と対照するためのものであるが、これにより各請求項の構成に何等影響を及ぼすものではない。 In addition, although the code | symbol in the said parenthesis is for contrast with drawing, it has no influence on the structure of each claim by this.

請求項１に係る本発明によると、第一の治具と第二の治具との回動に連動して、複数の回動曲げ部も回動することにより、複数個所の曲げ加工を同時に行っているため、加工時間を短くできる。また、曲げ加工時に、素材が前記第一の治具及び第二の治具に対し変位しない（引き込みが生じない）ため、該素材と治具との間で摺れ合いが生じることを防止でき、該素材に損傷が生じることを防止できる。また、曲げ加工時に該素材に引っ張り力が作用しないため、該素材の曲げ加工を正確に行える。 According to the first aspect of the present invention, the plural bending bending portions are also rotated in conjunction with the rotation of the first jig and the second jig, so that bending at a plurality of locations can be performed simultaneously. Since this is done, the processing time can be shortened. Further, since the material is not displaced with respect to the first jig and the second jig (no pull-in occurs) during bending, it is possible to prevent sliding between the material and the jig. , It is possible to prevent the material from being damaged. In addition, since no tensile force acts on the material during bending, the material can be accurately bent.

請求項２に係る本発明によると、曲げ加工時に素材の引き込みが生じることを、より確実に防止できる。 According to the second aspect of the present invention, it is possible to more reliably prevent the material from being pulled in during bending.

請求項３に係る本発明によると、より確実に曲げ加工時の素材の引き込みを防止できると共に、該素材と回動曲げ部及び治具側曲げ部との間で摺れ合いが生じることを、確実に防止できる。 According to the third aspect of the present invention, the material can be more reliably prevented from being pulled in during bending, and sliding between the material, the rotating bent portion, and the jig side bent portion can occur. It can be surely prevented.

請求項４に係る本発明によると、回動曲げ部により付与する曲げ力を、効率良く素材に伝達でき、曲げ加工をより容易に行える。 According to the fourth aspect of the present invention, the bending force applied by the rotating bending portion can be efficiently transmitted to the material, and bending can be performed more easily.

請求項５に係る本発明によると、各回動曲げ部を設けた各回転部材を、第一の治具と第二の治具との回動に連動させて回転させるように係合しているため、簡単な構成で、素材の複数個所に曲げ加工を行える。 According to this invention which concerns on Claim 5, it engages so that each rotation member provided with each rotation bending part may be rotated in response to rotation of a 1st jig | tool and a 2nd jig | tool. Therefore, bending can be performed at a plurality of locations of the material with a simple configuration.

請求項６に係る本発明によると、各部材を偏心させた状態で重ね合わせると共に、該各部材に設けた突起部と凹溝或は長孔とを係合させることにより、該各部材を容易に連動させることができ、素材の３個所に同時に曲げ加工を行える。 According to the sixth aspect of the present invention, the respective members are easily overlapped with each other in an eccentric state, and each of the members can be easily engaged by engaging the protrusion provided on each member with the concave groove or the long hole. And can be bent at three locations on the material at the same time.

請求項７に係る本発明によると、第一の回転部材に設けた回動曲げ部と第二の回転部材とを干渉させることなく、これら各部材を連動して回動させることができる。 According to the seventh aspect of the present invention, these members can be rotated in conjunction with each other without causing the rotating bending portion provided in the first rotating member to interfere with the second rotating member.

請求項８に係る本発明によると、平角線の複数個所に行う曲げ加工を、短時間で精度良く行える。また、曲げ加工の際に絶縁用のエナメル層を傷つけることがない為、良質な回転電機用コイルを得られる。 According to the eighth aspect of the present invention, the bending process performed at a plurality of locations of the flat wire can be performed with high accuracy in a short time. Further, since the enamel layer for insulation is not damaged during bending, a good quality coil for a rotating electrical machine can be obtained.

本発明により製造されるコイルを組み込んだステータを示す斜視図。The perspective view which shows the stator incorporating the coil manufactured by this invention. そのコイル（Ｕ相）を示す斜視図。The perspective view which shows the coil (U phase). 本発明の実施の形態に係る曲げ加工装置の概略を示す図。The figure which shows the outline of the bending processing apparatus which concerns on embodiment of this invention. 各回動曲げ部の支点を説明するために素材と各曲げ部とを抜き出して示す、図３の部分拡大図。FIG. 4 is a partially enlarged view of FIG. 3 showing the material and each bending portion in order to explain the fulcrum of each rotating bending portion. 本発明の実施の形態に係る曲げ加工装置の斜視図。The perspective view of the bending apparatus which concerns on embodiment of this invention. 同じく平面図。FIG. 図６の下側から見た図。The figure seen from the lower side of FIG. 図７の右側から見た図。The figure seen from the right side of FIG. 第一の治具を示す、斜視図及び平面図。The perspective view and top view which show a 1st jig | tool. 第一の治具に第二の治具を組み付けた状態を示す、斜視図及び平面図。The perspective view and top view which show the state which assembled | attached the 2nd jig | tool with the 1st jig | tool. 図１０の状態に更に第一の回転部材を組み付けた状態を示す、斜視図及び平面図。The perspective view and top view which show the state which assembled | attached the 1st rotation member further to the state of FIG. 図１１の状態に更に第二の回転部材を組み付けた状態を示す、斜視図及び平面図。The perspective view and top view which show the state which assembled | attached the 2nd rotation member further to the state of FIG. 本発明の実施の形態に係る曲げ加工装置による加工工程を順番に示す図。The figure which shows the process process by the bending apparatus which concerns on embodiment of this invention in order.

本発明の実施の形態を図面に沿って説明する。まず、本発明により製造されるコイルを組み込んだ回転電気（モータ、ジェネレータ等）のステータについて、図１及び図２に沿って説明する。本ステータ１は、ロータと共に電気モータ（ジェネレータを含む）を構成し、該電気モータは、電気自動車及びハイブリッド車輌の駆動源となる電気モータ（含むジェネレータ）、特にブラシレスＤＣモータに適用して好適である。ステータ１は、図１に示すように、多数の珪素鋼板の薄板を積層したステータコア２、及び、所定の素材であるマグネットワイヤ（導体、巻線）３を巻回したコイル４からなる。ステータコア２は、リング状からなり、内径側に開口するスロット５及びティース６が交互に多数形成されている。そして、所定ピッチ離れた２個のスロット５の間を分布巻きにて３相Ｕ，Ｖ，Ｗの各コイル４（４Ｕ，４Ｖ，４Ｗ）が巻かれている。 Embodiments of the present invention will be described with reference to the drawings. First, a rotary electric (motor, generator, etc.) stator incorporating a coil manufactured according to the present invention will be described with reference to FIGS. The stator 1 constitutes an electric motor (including a generator) together with a rotor, and the electric motor is suitable for application to an electric motor (including a generator) serving as a drive source for electric vehicles and hybrid vehicles, particularly a brushless DC motor. is there. As shown in FIG. 1, the stator 1 includes a stator core 2 in which a large number of thin silicon steel plates are laminated, and a coil 4 around which a magnet wire (conductor, winding) 3 that is a predetermined material is wound. The stator core 2 is formed in a ring shape, and a plurality of slots 5 and teeth 6 that are open on the inner diameter side are alternately formed. The three-phase U, V, W coils 4 (4U, 4V, 4W) are wound between the two slots 5 separated by a predetermined pitch by distributed winding.

マグネットワイヤ３は、断面矩形状の平角線からなり、銅等からなる導体部の全周に絶縁樹脂等の絶縁被膜が形成されている。上記ワイヤ３からなる３相のコイル４Ｕ，４Ｖ，４Ｗは、同相のスロット５内においては、同相の複数本（例えば４本）のワイヤ３がステータコア２の径方向に並んで配置されており、かつステータコア２の軸方向Ｌの一端面７から突出した一端側コイルエンド部８においては、同相の複数本のワイヤ３がステータコア２の径方向（又は軸方向）に並んで配置され、ステータコア２の軸方向Ｌの他端面９から突出した他端側コイルエンド部１０においては、同相の複数本のワイヤ３がステータコア２の径方向内径側に屈曲すると共にステータコア２の径方向に並んで配置されている。 The magnet wire 3 is a rectangular wire having a rectangular cross section, and an insulating coating such as an insulating resin is formed on the entire circumference of a conductor portion made of copper or the like. The three-phase coils 4U, 4V, 4W made of the wires 3 are arranged in the same-phase slot 5 in which a plurality of (for example, four) wires 3 having the same phase are arranged side by side in the radial direction of the stator core 2. In addition, in the one end side coil end portion 8 protruding from the one end surface 7 in the axial direction L of the stator core 2, a plurality of wires 3 having the same phase are arranged side by side in the radial direction (or axial direction) of the stator core 2. In the other end side coil end portion 10 protruding from the other end surface 9 in the axial direction L, a plurality of wires 3 having the same phase are bent toward the radially inner diameter side of the stator core 2 and arranged side by side in the radial direction of the stator core 2. Yes.

代表してＵ相のコイル４Ｕを示すと、コイル４Ｕは、図２に示すように、隣接する２個のスロット５，５を占めるように、２組４Ｕ１，４Ｕ２がセットとなって、隣接する２個のスロット５，５の近い方同士、遠い同士が所定間隔隔てて連結するようかつ上記２組が交互に連結するように構成されている。各組のコイル４Ｕ１，４Ｕ２は、スロット５内に配置されるスロット導体部１１と、ステータコア２の一端面７から突出して、所定間隔隔てたスロット導体部１１を連結するように、周方向Ｍに延びる一端側コイルエンド部８と、ステータコア２の他端面９から突出して、所定間隔離れたスロット導体部１１と連結するように、内径方向Ｒ１に屈曲して周方向Ｍに延びる他端側コイルエンド部１０と、からなる。両コイルエンド部８，１０は、それぞれが軸方向Ｌ又は径方向Ｒに互に干渉することなく並ぶように、周方向に（例えばＹ）又は軸方向に（例えばＸ）複数に屈曲して（折り曲げて）いる。 As a representative example, the U-phase coil 4U is adjacent to the coil 4U in such a way that two sets 4U1 and 4U2 are set so as to occupy two adjacent slots 5 and 5, as shown in FIG. The two slots 5 and 5 are configured such that the closer and far ends of the two slots 5 and 5 are connected with a predetermined distance therebetween, and the two sets are connected alternately. Each set of coils 4U1 and 4U2 projects in the circumferential direction M so as to connect the slot conductor portion 11 disposed in the slot 5 and the slot conductor portion 11 protruding from one end surface 7 of the stator core 2 and spaced apart from each other. One end side coil end portion 8 extending from the other end face 9 of the stator core 2 and the other end side coil end extending in the circumferential direction M by bending in the inner diameter direction R1 so as to be connected to the slot conductor portion 11 separated by a predetermined distance. Part 10. Both coil end portions 8 and 10 are bent in a plurality of circumferential directions (for example, Y) or axial directions (for example, X) so that they are arranged without interfering with each other in the axial direction L or the radial direction R ( It is bent).

上述のように、コイル４は、コイルエンド部８、１０等で複数個所に折り曲げている。また、これらコイルエンド部８，１０では、互いに曲げ方向を異ならせて略Ｓ字状に形成している。このようなコイルエンド部８，１０を成形する曲げ加工装置１２の概略について、図３により説明する。 As described above, the coil 4 is bent at a plurality of locations by the coil end portions 8, 10 and the like. In addition, the coil end portions 8 and 10 are formed in a substantially S shape with different bending directions. An outline of the bending apparatus 12 for forming the coil end portions 8 and 10 will be described with reference to FIG.

曲げ加工装置１２は、第一の治具１３と第二の治具１４とを回動軸１５により相対的に回動自在に連結し、更に、該第一の治具１３と第二の治具１４との回動に連動して、それぞれの支点を中心として回動する、第一の回動曲げ部１６及び第二の回動曲げ部１７を備えてなる。なお、図３では、回動軸１５は、その中心Ｏのみを示している。 The bending apparatus 12 connects the first jig 13 and the second jig 14 so as to be relatively rotatable by a rotation shaft 15, and further, the first jig 13 and the second jig are connected. In conjunction with the rotation with the tool 14, the first rotation bending portion 16 and the second rotation bending portion 17 that rotate around the respective fulcrums are provided. In FIG. 3, only the center O of the rotating shaft 15 is shown.

このうちの第一の治具１３は、抑え部１８と、治具側曲げ部１９とを備える。該抑え部１８は、第一の治具１３に断面矩形の平角線等の素材Ｗを配置した状態で、該素材Ｗの回動方向と反対側（図３の上側）に配置される。該素材Ｗを配置した状態では、前記抑え部１８の抑え面２０が該素材Ｗに当接する。 Among these, the first jig 13 includes a holding part 18 and a jig side bending part 19. The holding portion 18 is disposed on the opposite side (upper side in FIG. 3) of the rotation direction of the material W in a state where the material W such as a rectangular wire having a rectangular cross section is disposed on the first jig 13. In a state where the material W is disposed, the restraining surface 20 of the restraining portion 18 contacts the material W.

また、前記治具側曲げ部１９は、外周面を円筒状に形成し、その中心が前記回動軸１５の回動中心Ｏから前記素材Ｗの回動側に、所定量オフセットした位置に配置されている。前記素材Ｗを配置した状態では、前記治具側曲げ部１９の外周面が該素材Ｗの回動側の側面に当接し、該素材Ｗが前記抑え部１８の抑え面２０と該治具側曲げ部１９の外周面とで挟持される。 Further, the jig side bending portion 19 has an outer peripheral surface formed in a cylindrical shape, and the center thereof is disposed at a position offset from the rotation center O of the rotation shaft 15 to the rotation side of the material W by a predetermined amount. Has been. In the state where the material W is arranged, the outer peripheral surface of the jig side bending portion 19 abuts on the side surface on the rotation side of the material W, and the material W is in contact with the holding surface 20 of the holding portion 18 and the jig side. It is sandwiched between the outer peripheral surface of the bent portion 19.

また、前記第二の治具１４は、前記第一の治具１３と同様の抑え部１８を備える。但し、該第一の治具１３と異なり、治具側曲げ部１９は備えていない。 The second jig 14 includes a holding portion 18 similar to the first jig 13. However, unlike the first jig 13, the jig side bending portion 19 is not provided.

また、前記第一の回動曲げ部１６及び第二の回動曲げ部１７は、外周面を円筒状に形成し、その回動中心となる支点Ｐ，Ｑを、前記回動軸１５の回動中心Ｏから所定量オフセットして（偏心して）配置している。そして、例えばカム機構等により、前記第一の治具１３と前記第二の治具１４との回動に連動させて、それぞれの支点Ｐ，Ｑを中心に、図３の実線部分と破線部分との間を回動自在としている。 Further, the first rotation bending portion 16 and the second rotation bending portion 17 have an outer peripheral surface formed in a cylindrical shape, and fulcrums P and Q serving as the rotation centers are formed on the rotation shaft 15. A predetermined amount is offset (eccentric) from the moving center O. Then, for example, by a cam mechanism or the like, the solid line portion and the broken line portion in FIG. 3 centering on the respective fulcrums P and Q in conjunction with the rotation of the first jig 13 and the second jig 14. It is possible to rotate between the two.

また、前記各支点Ｐ，Ｑ及び前記治具側曲げ部１９をオフセットする位置は、前記曲げ加工装置１２により素材Ｗに複数個所の曲げ加工を施す際に、該素材Ｗが前記両治具１３，１４に対し変位しない位置とする。また、前記素材Ｗに曲げ加工を施す場合には、前記第一の治具１３と前記第二の治具１４との回動に連動させて、前記各回動曲げ部１６，１７を回動させることにより、前記素材Ｗの複数個所に同時に曲げ加工を施す。 The positions at which the fulcrums P and Q and the jig side bending portion 19 are offset are determined when the material W is bent at a plurality of locations by the bending device 12. , 14 is a position not displaced. In addition, when bending the material W, the rotary bending portions 16 and 17 are rotated in conjunction with the rotation of the first jig 13 and the second jig 14. As a result, bending is simultaneously performed on a plurality of locations of the material W.

上述のような曲げ加工を可能とするために、回動軸１５の回動中心Ｏ、及び、各回動曲げ部１６，１７の各支点Ｐ，Ｑを、次のように設定する。この点について、図３、４を用いて説明する。まず、素材Ｗの曲げ加工前の直線状態（図３、４の実線）と、所望の曲げ加工後の状態（図３、４の鎖線）とをそれぞれ想定する。本実施の形態の場合、所望の曲げ加工後の状態は、全体として９０°曲げつつ、曲げた部分をＳ字状とする。即ち、前記素材Ｗの曲げ個所は、３個所である。 In order to enable the bending process as described above, the rotation center O of the rotation shaft 15 and the fulcrums P and Q of the rotation bending portions 16 and 17 are set as follows. This point will be described with reference to FIGS. First, a straight state before bending the material W (solid line in FIGS. 3 and 4) and a desired state after bending (a chain line in FIGS. 3 and 4) are assumed. In the case of the present embodiment, the state after the desired bending process is an S-shaped bent portion while being bent by 90 ° as a whole. That is, there are three bending portions of the material W.

このように素材Ｗの曲げ加工前と曲げ加工後との状態を想定したら、前記回動軸１５の回動中心Ｏを、次のように定める。まず、前記治具側曲げ部１９と前記素材Ｗとが、曲げ加工前と曲げ加工後とで当接している同じ点と、該治具側曲げ部１９の中心とを通る仮想線が、前記素材Ｗの中立線と交差する点を、始点Ｒとする。図示の例の場合、前記始点Ｒは、前記治具側曲げ部１９により前記素材Ｗが曲がり始める位置の中立線上の点となる。 As described above, assuming the state before and after the bending of the material W, the rotation center O of the rotation shaft 15 is determined as follows. First, an imaginary line passing through the same point where the jig side bending portion 19 and the material W are in contact before and after bending and the center of the jig side bending portion 19 is A point that intersects the neutral line of the material W is defined as a starting point R. In the case of the illustrated example, the starting point R is a point on the neutral line at which the material W starts to bend by the jig side bending portion 19.

次に、前記始点Ｒから、曲げ加工の際に前記治具側曲げ部１９及び前記各回動曲げ部１６，１７により曲げられる部分を含む、前記素材Ｗの中立線Ｎの長さが、該素材の曲げ加工前の状態と曲げ加工後の状態とで同じである長さ離れた、該中立線上の位置を、基準点Ｏ１，Ｏ２とする。本実施の形態の場合、図３に示すように、曲げ加工前と曲げ加工後とで、前記素材Ｗの中立線Ｎの前記第二の治具１４の先端に相当する位置にそれぞれ存在する点を、基準点Ｏ１，Ｏ２とする。 Next, from the starting point R, the length of the neutral line N of the material W including the portion bent by the jig side bending portion 19 and the rotating bending portions 16 and 17 during bending is determined by the length of the material W. The positions on the neutral line that are the same distance in the state before bending and the state after bending are defined as reference points O1 and O2. In the case of the present embodiment, as shown in FIG. 3, the point existing at the position corresponding to the tip of the second jig 14 of the neutral line N of the material W before and after the bending process. Are set as reference points O1 and O2.

そして、該基準点Ｏ１，Ｏ２までの距離が同じとなる位置を、前記回動中心Ｏとする。即ち、距離Ｏ−Ｏ１と距離Ｏ−Ｏ２とは、同じ長さとなる。また、該回動中心Ｏの位置は、前記両治具１３，１４の回動角度に応じて定める。即ち、該回動中心Ｏと曲げ加工前の基準点Ｏ１とを結ぶ直線Ｏ−Ｏ１と、該回動中心Ｏと曲げ加工後の基準点Ｏ２とを結ぶ直線Ｏ−Ｏ２とが成す角度が、前記第一の治具１３と前記第二の治具１４との回動角度に応じた角度となるように定める。本実施の形態の場合、回動角度が９０°であるため、直線Ｏ−Ｏ１と直線Ｏ−Ｏ２との成す角度が９０°となる位置に、前記回動中心Ｏを配置する。 A position where the distances to the reference points O1 and O2 are the same is defined as the rotation center O. That is, the distance O-O1 and the distance O-O2 have the same length. The position of the rotation center O is determined according to the rotation angle of the jigs 13 and 14. That is, the angle formed by the straight line O-O1 connecting the rotation center O and the reference point O1 before bending and the straight line O-O2 connecting the rotation center O and the reference point O2 after bending is as follows. The first jig 13 and the second jig 14 are determined to have an angle corresponding to the rotation angle. In the case of the present embodiment, since the rotation angle is 90 °, the rotation center O is arranged at a position where the angle formed by the straight line O-O1 and the straight line O-O2 is 90 °.

なお、前記治具側曲げ部１９と前記回動軸１５とのオフセット量は、次のような点を考慮して定めることもできる。まず、素材Ｗが各曲げ部１６，１７，１９により曲げられることにより、曲げ加工後の、前記始点Ｒから前記基準点Ｏ２までのｙ方向（図３の上下方向）の距離が、曲げ加工前の該始点Ｒから前記基準点Ｏ１までの距離よりも縮むため、この縮む量を考慮する。また、治具側曲げ部１９に沿って折り曲げ、それ以上折り曲げないとした場合（各回動曲げ部１６，１７がないとした場合）の素材Ｗの先端位置に対する、実際の素材Ｗの先端位置のｘ方向（図３の左右方向）の変位量を考慮する。そして、これらの点を考慮して、曲げ加工の前後で素材Ｗが前記両治具１３，１４に対し変位しないように、前記治具側曲げ部１９と前記回動軸１５との位置関係（オフセット量）を定める。 The offset amount between the jig-side bending portion 19 and the rotation shaft 15 can be determined in consideration of the following points. First, since the material W is bent by each of the bending portions 16, 17, and 19, the distance in the y direction (vertical direction in FIG. 3) from the starting point R to the reference point O2 after bending is the value before bending. Therefore, the amount of contraction is taken into consideration. Also, the actual position of the tip of the material W relative to the position of the tip of the material W when bent along the jig-side bent portion 19 and not bent further (when there are no rotating bent portions 16 and 17). Consider the amount of displacement in the x-direction (left-right direction in FIG. 3). In consideration of these points, the positional relationship between the jig-side bending portion 19 and the rotary shaft 15 (so that the material W is not displaced relative to the jigs 13 and 14 before and after the bending process ( Define the offset amount.

次に、前記各支点Ｐ，Ｑについて、図４も参照しつつ説明する。該各支点Ｐ，Ｑを求める場合にも、同様に、素材Ｗの曲げ加工前の直線状態と、所望の曲げ加工後の状態とをそれぞれ想定する。また、同様に、前記治具側曲げ部１９と前記素材Ｗとが、曲げ加工前と曲げ加工後とで当接している同じ点と、該治具側曲げ部１９の中心とを通る仮想線が、前記素材Ｗの中立線と交差する点を、始点Ｒとする。 Next, the fulcrums P and Q will be described with reference to FIG. Similarly, when the fulcrums P and Q are obtained, a straight state before the bending of the material W and a state after the desired bending are assumed. Similarly, an imaginary line passing through the same point where the jig-side bending portion 19 and the material W are in contact before and after bending and the center of the jig-side bending portion 19. However, let the point that intersects the neutral line of the material W be the starting point R.

更に、前記各回動曲げ部１６，１７と前記素材Ｗとが、曲げ加工前と曲げ加工後とで当接している同じ点と、該回動曲げ部１６，１７の中心とを通る仮想線が、該素材Ｗの中立線Ｎと交差するそれぞれの点を終点Ｐ１，Ｐ２，Ｑ１，Ｑ２とする。 Further, an imaginary line passing through the same point where each of the rotating bent portions 16 and 17 and the material W are in contact before and after the bending and the center of the rotating bent portions 16 and 17 is provided. The points intersecting the neutral line N of the material W are defined as end points P1, P2, Q1, and Q2.

そして、曲げ加工前の前記始点Ｒと前記終点Ｐ１，Ｑ１との間の中立線Ｎの長さＸ，Ｙが、曲げ加工後の該始点Ｒと前記終点Ｐ２，Ｑ２との間の中立線Ｎの長さとが同じとなるように、前記各回動曲げ部１６，１７がそれぞれ配置されるように、前記支点Ｐ，Ｑの位置を定める。 The lengths X and Y of the neutral line N between the starting point R and the end points P1 and Q1 before bending are neutral lines N between the starting point R and the end points P2 and Q2 after bending. The positions of the fulcrums P and Q are determined so that the rotary bending portions 16 and 17 are respectively arranged so that the lengths of the fulcrums are the same.

例えば、まず、曲げ加工後の位置に各回動曲げ部１６，１７を配置し、終点Ｐ２，Ｑ２を求める。これにより、前記始点Ｒから該終点Ｐ２，Ｑ２までの素材Ｗの中立線の長さを求めることができる。この中立線の長さが分かれば、曲げ加工前の終点Ｐ１，Ｑ１も分かるため、曲げ加工前の各回動曲げ部１６，１７の位置を定めることができる。各回動曲げ部１６，１７の曲げ加工前と曲げ加工後との位置が定まれば、これら曲げ加工前と曲げ加工後とでそれぞれ同じ距離となる位置に、前記支点Ｐ，Ｑが存在することになる。即ち、支点Ｐと曲げ加工前の第一の回動曲げ部１６の中心との距離と、支点Ｐと曲げ加工後の第一の回動曲げ部１６の中心との距離とは、同じ長さとなる。同様に、支点Ｑと曲げ加工前の第二の回動曲げ部１７の中心との距離と、支点Ｑと曲げ加工後の第二の回動曲げ部１７の中心との距離とは、同じ長さとなる。 For example, first, the rotational bending parts 16 and 17 are arranged at positions after bending, and the end points P2 and Q2 are obtained. Thereby, the length of the neutral line of the material W from the start point R to the end points P2 and Q2 can be obtained. If the length of this neutral line is known, the end points P1 and Q1 before bending are also known, so that the positions of the rotary bending portions 16 and 17 before bending can be determined. If the positions of the rotary bending portions 16 and 17 before and after the bending are determined, the fulcrums P and Q exist at the same distance before and after the bending. become. That is, the distance between the fulcrum P and the center of the first rotating bent part 16 before bending and the distance between the fulcrum P and the center of the first rotating bent part 16 after bending are the same length. Become. Similarly, the distance between the fulcrum Q and the center of the second rotating bent portion 17 before bending and the distance between the fulcrum Q and the center of the second rotating bent portion 17 after bending are the same length. It becomes.

そして、各回動曲げ部の回動角度に応じて、前記支点Ｐ，Ｑの位置を定める。本実施の形態の場合、前記各回動曲げ部１６，１７を９０°回動させるため、各支点Ｐ，Ｑと、曲げ加工前と曲げ加工とのそれぞれ位置の各回動曲げ部１６，１７の中心とを結ぶ角度が９０°となるように、前記支点Ｐ，Ｑを定めている。 Then, the positions of the fulcrums P and Q are determined according to the rotation angle of each rotation bending portion. In the case of the present embodiment, in order to rotate the rotary bending portions 16 and 17 by 90 °, the centers of the rotary bending portions 16 and 17 at the positions of the fulcrums P and Q and the positions before and after the bending process, respectively. The fulcrums P and Q are determined so that the angle connecting them is 90 °.

なお、本実施の形態の場合、曲げ加工後の終点Ｐ２，Ｑ２は、前記素材Ｗの前記各回動曲げ部１６，１７による曲げ部分の、それぞれの中立線Ｎの中央とする。即ち、各回動曲げ部１６，１７は、曲げ加工後の曲げ部分の中央となる部分を中心に、前記素材Ｗを押す。これにより、各回動曲げ部１６，１７により付与する曲げ力を、効率良く該素材Ｗに伝達でき、曲げ加工をより容易に行える。 In the case of the present embodiment, the end points P2 and Q2 after bending are the centers of the neutral lines N of the bent portions of the material W formed by the rotating bending portions 16 and 17, respectively. That is, each turning bending part 16 and 17 pushes the said raw material W centering on the part used as the center of the bending part after a bending process. Thereby, the bending force provided by each rotation bending part 16 and 17 can be efficiently transmitted to this material W, and bending can be performed more easily.

但し、前記終点Ｐ１，Ｐ２，Ｑ１，Ｑ２の位置は、曲げ加工前と曲げ加工後との何れの場合も、前記各回動曲げ部１６，１７と前記素材Ｗとが当接している点から定めれば良く、上述の位置に限定されない。例えば、曲げ加工後の各回動曲げ部１６，１７と素材Ｗの曲げ部分の当接している範囲であれば、任意に設定可能である。この場合、曲げ加工前の各回動曲げ部１６，１７の位置を、図示の例の位置から前記曲げ加工後に当接している長さの範囲の中で、図４の左右方向に移動させられる。なお、これに伴い、支点Ｐ，Ｑの位置も図示の例からずれる。何れにしても、素材Ｗの中立線Ｎの長さが、各曲げ部１６，１７，１９による曲げ加工の前後でも変わらないように、前記支点Ｐ，Ｑを定めれば良い。 However, the positions of the end points P1, P2, Q1, and Q2 are determined from the points where the rotary bending portions 16 and 17 and the material W are in contact with each other before and after bending. What is necessary is just and it is not limited to the above-mentioned position. For example, it can be arbitrarily set as long as it is in a range where the respective bent bending parts 16 and 17 after bending and the bent part of the material W are in contact with each other. In this case, the positions of the rotary bending portions 16 and 17 before bending are moved in the left-right direction in FIG. 4 within the range of the length abutted after the bending from the position of the illustrated example. Accordingly, the positions of the fulcrums P and Q are also deviated from the illustrated example. In any case, the fulcrums P and Q may be determined so that the length of the neutral line N of the material W does not change before and after the bending by the bending portions 16, 17 and 19.

このように、回動中心Ｏ、各支点Ｐ，Ｑを定めることにより、該素材Ｗの中立線Ｎの、曲げ加工後に前記各回動曲げ部１６，１７及び前記治具側曲げ部１９により曲げられた部分を含む所定の長さを、曲げ加工前と曲げ加工後とで同じすることができる。即ち、曲げ加工前の前記始点Ｒから前記基準点Ｏ１までの前記中立線Ｎの長さＺと、曲げ加工後の該始点Ｒから前記基準点Ｏ２までの該中立線Ｎの長さとが、同じとなる。 Thus, by defining the rotation center O and the fulcrums P and Q, the neutral line N of the material W is bent by the rotation bending portions 16 and 17 and the jig side bending portion 19 after the bending process. The predetermined length including the bent portion can be made the same before and after the bending process. That is, the length Z of the neutral line N from the starting point R to the reference point O1 before bending is the same as the length of the neutral line N from the starting point R to the reference point O2 after bending. It becomes.

なお、本実施の形態の場合、第一の治具１３と第二の治具１４とを９０°相対回転させると共に、第一の回動曲げ部１６及び第二の回動曲げ部１７を各支点Ｐ，Ｑを中心に９０°回動させているが、曲げ形状によっては、両治具１３，１４の回動角度と、前記各回動曲げ部１６，１７の回動角度とを変えても良い。例えば、Ｓ字形状を図示の例よりも緩やかにする場合には、前記両治具１３，１４の回動角度よりも、前記各回動曲げ部１６，１７の回動角度を小さくする。本実施の形態の構造の場合、回動角度θを０°＜θ≦９０°に設定できる。 In the case of the present embodiment, the first jig 13 and the second jig 14 are rotated 90 degrees relative to each other, and the first rotation bending section 16 and the second rotation bending section 17 are respectively provided. Although it is rotated 90 ° around the fulcrums P and Q, depending on the bending shape, the rotation angle of both jigs 13 and 14 and the rotation angle of each of the rotating bending portions 16 and 17 may be changed. good. For example, when the S-shape is made gentler than the illustrated example, the rotation angle of each of the rotary bending portions 16 and 17 is made smaller than the rotation angle of the jigs 13 and 14. In the case of the structure of the present embodiment, the rotation angle θ can be set to 0 ° <θ ≦ 90 °.

上述のように構成し作用する曲げ加工装置１２のより具体的な構造の１例について、図５ないし図１２により説明する。曲げ加工装置１２は、第一の治具１３と第二の治具１４との回動軸１５の軸方向にそれぞれ重ねて配置され、該回動軸１５から偏心した位置を支点として回転する第一の回転部材２１及び第二の回転部材２２を備える。該各回転部材２１、２２は、前記第一の治具１３と前記第二の治具１４との回動と連動して、それぞれの支点を中心に回転可能に互いに係合されている。 One example of a more specific structure of the bending apparatus 12 configured and acting as described above will be described with reference to FIGS. The bending device 12 is disposed so as to overlap each other in the axial direction of the rotation shaft 15 of the first jig 13 and the second jig 14, and rotates with a position eccentric from the rotation shaft 15 as a fulcrum. One rotating member 21 and a second rotating member 22 are provided. The rotating members 21 and 22 are engaged with each other so as to be rotatable around their respective fulcrums in conjunction with the rotation of the first jig 13 and the second jig 14.

即ち、前記第一の治具１３と前記第二の治具１４とは、図１０に示すように、該第一の治具１３の端部で肉厚が薄い薄肉部２３ａに設けた、前記回動軸１５と同心の第一の円筒部２４に、該第二の治具１４の端部で肉厚が薄い薄肉部２３ｂに設けた、該回動軸１５と同心の円孔２５を嵌合することにより回動自在に連結されている。 That is, as shown in FIG. 10, the first jig 13 and the second jig 14 are provided in the thin portion 23a having a small thickness at the end of the first jig 13. The first cylindrical portion 24 concentric with the rotating shaft 15 is fitted with a circular hole 25 concentric with the rotating shaft 15 provided in the thin portion 23b having a small thickness at the end of the second jig 14. By being joined, they are pivotally connected.

また、前記第一の回転部材２１は外周面が円筒面状の第二の回動曲げ部１７を、第二の回転部材２２は外周面が円筒状の第一の回動曲げ部１６を、それぞれ有する。該各回動曲げ部１６，１７の円筒面の曲率半径は、該素材Ｗの該各回動曲げ部１６，１７により曲げられた部分の内周面の曲率半径と、それぞれ同じとしている。また、該各回動曲げ部１６，１７の位置関係は、前述の図３、４で説明した通りである。したがって、前記第一の回転部材２１の回転中心は、前述の図４に示した支点Ｑに、前記第二の回転部材２２の回転中心は、同じく支点Ｐに、それぞれ相当する。 The first rotating member 21 has a second rotating bent portion 17 whose outer peripheral surface is cylindrical, and the second rotating member 22 has a first rotating bent portion 16 whose outer peripheral surface is cylindrical. Have each. The radius of curvature of the cylindrical surface of each of the rotating bent portions 16 and 17 is the same as the radius of curvature of the inner peripheral surface of the portion of the material W bent by the rotating bent portions 16 and 17. Further, the positional relationship between the rotary bending portions 16 and 17 is as described with reference to FIGS. Therefore, the rotation center of the first rotation member 21 corresponds to the fulcrum Q shown in FIG. 4 and the rotation center of the second rotation member 22 corresponds to the fulcrum P, respectively.

また、前記第一の回転部材２１に設けた第二の回動曲げ部１７の突出量は、前記第二の回転部材２２の板厚に前記第一の回動曲げ部１６の突出量を足した量とする。このため、該第二の回転部材２２には、後述するように、切り欠き３１を形成し、前記第二の回動曲げ部１７が突出することを許容している。 Further, the amount of protrusion of the second rotating bending portion 17 provided on the first rotating member 21 is obtained by adding the amount of protrusion of the first rotating bending portion 16 to the plate thickness of the second rotating member 22. The amount. For this reason, as will be described later, a cutout 31 is formed in the second rotating member 22 to allow the second rotating bending portion 17 to protrude.

また、前記第一の治具１３は、図９に示すように、前記第一の円筒部２４に互いの中心軸が偏心した第二の円筒部２６及び第三の円筒部２７を軸方向に重ねて配置している。前記第一の回転部材２１及び第二の回転部材２２は、図１１、１２に示すように、それぞれに設けた前記各回動曲げ部１６，１７の支点と同心の円孔２８ａ、２８ｂを、前記第二の円筒部２６及び第三の円筒部２７に嵌合することにより、それぞれ、該第二の円筒部２６及び第三の円筒部２７に回転自在に支持されている。 Further, as shown in FIG. 9, the first jig 13 includes a second cylindrical portion 26 and a third cylindrical portion 27 whose axial axes are eccentric to the first cylindrical portion 24 in the axial direction. They are arranged in layers. As shown in FIGS. 11 and 12, the first rotating member 21 and the second rotating member 22 have circular holes 28 a and 28 b concentric with the fulcrums of the rotary bending portions 16 and 17 provided respectively. By being fitted to the second cylindrical portion 26 and the third cylindrical portion 27, they are rotatably supported by the second cylindrical portion 26 and the third cylindrical portion 27, respectively.

また、前記第二の治具１４及び前記第一の回転部材２１は、円周方向所定位置にそれぞれ軸方向に突出する突起部２９ａ，２９ｂを有する。また、前記第一の回転部材２１及び第二の回転部材２２は、円周方向所定位置で前記突起部２９ａ，２９ｂに整合する位置に、それぞれ軸方向に貫通し周方向に対し傾斜した方向に長い長孔３０ａ，３０ｂを有する。 The second jig 14 and the first rotating member 21 have protrusions 29a and 29b that protrude in the axial direction at predetermined positions in the circumferential direction. In addition, the first rotating member 21 and the second rotating member 22 are respectively penetrated in the axial direction and inclined with respect to the circumferential direction at positions aligned with the protrusions 29a and 29b at predetermined positions in the circumferential direction. It has long long holes 30a and 30b.

なお、前記各長孔３０ａ，３０ｂの傾斜方向及び長さは、前記各回転部材２１、２２の前記回動軸１５に対する偏心方向及び偏心量を考慮して、前記両治具１３，１４の回動に連動して前記各回転部材２１，２２が円滑に回動するように定める。また、前記各長孔３０ａ，３０ｂは、それぞれの側面（図７、８の下面）に開口し軸方向に凹んだ凹溝としても良い。該各凹溝についても周方向に対し傾斜した方向に長く形成する。また、突起部と長孔或は凹溝との位置関係は、逆であっても良い。 Note that the inclination direction and length of each of the long holes 30a and 30b are determined by considering the eccentric direction and the eccentric amount of the rotary members 21 and 22 with respect to the rotating shaft 15, and turning the jigs 13 and 14. The rotating members 21 and 22 are determined so as to smoothly rotate in conjunction with the movement. Each of the long holes 30a and 30b may be a groove that opens on the side surface (the lower surface in FIGS. 7 and 8) and is recessed in the axial direction. Each of the concave grooves is also formed long in a direction inclined with respect to the circumferential direction. Further, the positional relationship between the protrusion and the long hole or the concave groove may be reversed.

そして、前記各突起部２９ａ，２９ｂを前記各長孔３０ａ，３０ｂにそれぞれ係合することにより、前記第一の治具１３と前記第二の治具１４との回動に連動して、前記第一の回転部材２１及び前記第二の回転部材２２を回転させる。 Then, by engaging the projections 29a and 29b with the long holes 30a and 30b, respectively, the first jig 13 and the second jig 14 are rotated in conjunction with the rotation. The first rotating member 21 and the second rotating member 22 are rotated.

即ち、両治具１３，１４が相対的に回動すると、前記第二の治具１４に設けた突起部２９ａが第一の円筒部２４（回動中心Ｏ）を中心として回動する。該突起部２９ａは前記第一の回転部材２１の長孔３０ａに係合しており、該第一の回転部材２１の回転中心となる第二の円筒部２６の中心（支点Ｑ）は前記第一の円筒部２４の中心に対し偏心しているため、前記突起部２９ａが前記長孔３０ａに沿って移動しつつ回転力を伝達し、前記第一の回転部材２１が回転する。 That is, when both the jigs 13 and 14 are relatively rotated, the protrusion 29a provided on the second jig 14 is rotated about the first cylindrical portion 24 (rotation center O). The projecting portion 29a is engaged with the elongated hole 30a of the first rotating member 21, and the center (fulcrum point Q) of the second cylindrical portion 26 serving as the center of rotation of the first rotating member 21 is the first rotating member 21. Since it is eccentric with respect to the center of one cylindrical portion 24, the projection 29a transmits a rotational force while moving along the elongated hole 30a, and the first rotating member 21 rotates.

また、前記第一の回転部材２１が回転すると、該第一の回転部材２１に設けた突起部２９ｂが、前記第二の円筒部２６（支点Ｑ）を中心として回動する。該突起部２９ｂは前記第二の回転部材２２の長孔３０ｂに係合しており、該第二の回転部材２２の回転中心となる第三の円筒部２７の中心（支点Ｐ）は前記第二の円筒部２６の中心に対し偏心しているため、前記突起部２９ｂが前記長孔３０ｂに沿って移動しつつ回転力を伝達し、前記第二の回転部材２２が回転する。 When the first rotating member 21 rotates, the protrusion 29b provided on the first rotating member 21 rotates about the second cylindrical portion 26 (fulcrum Q). The protrusion 29b is engaged with the elongated hole 30b of the second rotating member 22, and the center (fulcrum P) of the third cylindrical portion 27 serving as the rotation center of the second rotating member 22 is Since it is eccentric with respect to the center of the second cylindrical portion 26, the projecting portion 29b transmits a rotational force while moving along the elongated hole 30b, and the second rotating member 22 rotates.

また、前記第二の回転部材２２は、周方向に長い切り欠き３１を有する。そして、前記第一の回転部材２１に設けた第二の回動曲げ部１７を、前記切り欠き３１内に配置している。前記切り欠き３１の周方向長さは、前記第一の回転部材２１と前記第二の回転部材２２との相対的な回動量よりも大きくする。これにより、前記第一の回転部材２１に設けた第二の回動曲げ部１７と前記第二の回転部材２２とを干渉させることなく、これら各部材２１，２２を連動して回動させることができる。 The second rotating member 22 has a notch 31 that is long in the circumferential direction. A second turning bending portion 17 provided on the first rotating member 21 is disposed in the notch 31. The circumferential length of the notch 31 is set larger than the relative rotation amount of the first rotating member 21 and the second rotating member 22. Accordingly, the members 21 and 22 are rotated in conjunction with each other without causing the second rotating and bending portion 17 provided on the first rotating member 21 to interfere with the second rotating member 22. Can do.

また、前記第一の治具１３及び前記第二の治具１４は、薄肉部２３ａ，２３ｂを除く部分を厚肉部３２ａ，３２ｂとし、該各厚肉部３２ａ，３２ｂ上に素材Ｗを配置するようにしている。このために、該各厚肉部３２ａ，３２ｂ上に、該素材Ｗを挟むように抑え部１８，１８及び保持部３３ａ，３３ｂをそれぞれ配置している。前記両治具１３，１４に前記素材Ｗを配置した状態では、前記抑え部１８，１８の抑え面２０と前記保持部３３ａ，３３ｂの保持面３４とで、該素材Ｗを挟持する。そして、該素材Ｗが前記両治具１３，１４の回動方向と反対側に変位することを抑えると共に、回動時に、不用意に該素材Ｗが外れることを防止する。 Further, in the first jig 13 and the second jig 14, the portions excluding the thin portions 23a and 23b are formed as the thick portions 32a and 32b, and the material W is disposed on the thick portions 32a and 32b. Like to do. For this purpose, the holding portions 18 and 18 and the holding portions 33a and 33b are arranged on the thick portions 32a and 32b so as to sandwich the material W, respectively. In a state where the material W is disposed on both the jigs 13 and 14, the material W is sandwiched between the restraining surface 20 of the restraining portions 18 and 18 and the retaining surface 34 of the retaining portions 33 a and 33 b. And while suppressing that the said raw material W displaces to the opposite direction to the rotation direction of the said jig | tool 13,14, it prevents that this raw material W remove | deviates carelessly at the time of rotation.

また、図５、７に示すように、前記各厚肉部３２ａ，３２ｂの前記素材Ｗを配置する側の面は、前記両治具１３，１４に前記第一の回転部材２１及び第二の回転部材２２を重ね合わせた状態で、該各回転部材２１，２２にそれぞれ設けた第一の回動曲げ部１６と第二の回動曲げ部１７との間部分に、前記素材Ｗが配置される位置とする。即ち、前記各厚肉部３２ａ，３２ｂの厚さを、薄肉部２３ａ，２３ｂ、各回転部材２１，２２を足し合わせた厚さとほぼ同じとし、前記各厚肉部３２ａ，３２ｂ上に配置された素材Ｗが、前記各回転部材２１，２２上に配置された各回動曲げ部１６，１７同士の間に配置されるようにしている。 Further, as shown in FIGS. 5 and 7, the surfaces of the thick portions 32 a and 32 b on the side where the material W is arranged are arranged on the jigs 13 and 14 with the first rotating member 21 and the second rotating member 21. In a state where the rotating members 22 are overlapped, the material W is disposed between the first rotating bent portion 16 and the second rotating bent portion 17 provided on the rotating members 21 and 22, respectively. Position. That is, the thicknesses of the thick portions 32a and 32b are substantially the same as the combined thickness of the thin portions 23a and 23b and the rotating members 21 and 22, and are disposed on the thick portions 32a and 32b. A material W is arranged between the rotary bending parts 16 and 17 arranged on the rotary members 21 and 22.

また、前記第一の治具１３に設けた保持部３３ａの、薄肉部２３ａ側の端面と抑え部１８と対向する側の面との連続部を部分円筒状に形成し、該連続部を治具側曲げ部１９としている。即ち、本実施の形態の場合、治具側曲げ部１９を前記保持部３３ａの一部に形成している。該治具側曲げ部１９の位置関係は、前述の図３、４で説明した通りである。 Further, the continuous portion of the holding portion 33a provided on the first jig 13 is formed in a partial cylindrical shape between the end surface on the thin portion 23a side and the surface facing the holding portion 18, and the continuous portion is cured. The material side bending portion 19 is used. That is, in the case of the present embodiment, the jig side bending portion 19 is formed in a part of the holding portion 33a. The positional relationship of the jig side bending portion 19 is as described with reference to FIGS.

また、該治具側曲げ部１９は、ほぼ９０°の角度を有する部分円筒面として、後述するように、前記両治具１３，１４の回動により素材Ｗを曲げる際に、該素材Ｗを部分円筒面に沿わせて曲げる。したがって、該部分円筒面の曲率半径は、該素材Ｗの前記治具側曲げ部１９により曲げられた部分の内周面の曲率半径と同じとしている。なお、該部分円筒面は、９０°ないし９５°、好ましくは、９２°ないし９３°とする。９０°よりも大きくすることが好ましいのは、素材Ｗの曲げ加工の際にスプリングバックを考慮して、該素材Ｗを９０°以上曲げるためである。 The jig-side bending portion 19 is a partial cylindrical surface having an angle of approximately 90 °, and the material W is bent when the material W is bent by the rotation of the jigs 13 and 14, as will be described later. Bend along the partial cylindrical surface. Therefore, the radius of curvature of the partial cylindrical surface is the same as the radius of curvature of the inner peripheral surface of the portion of the material W bent by the jig side bending portion 19. The partial cylindrical surface is 90 ° to 95 °, preferably 92 ° to 93 °. It is preferable to make the angle larger than 90 ° in order to bend the material W by 90 ° or more in consideration of springback when the material W is bent.

なお、前記第一の治具１３に設けた保持部３３ａの薄肉部２３ａ側の端面には、切り欠き３５を形成している。該切り欠き３５は、第一の回転部材２１と第二の回転部材２２との間の回転伝達のための突起部２９ｂが、長孔３０ｂから突出した場合でも、該突起部２９ｂが前記保持部３３ａと干渉することを防止するために設けたものである。したがって、干渉の可能性がなければ、切り欠き３５を省略しても良い。 A notch 35 is formed on the end surface of the holding portion 33a provided on the first jig 13 on the thin portion 23a side. The notch 35 is formed so that the protrusion 29b is formed in the holding portion even when the protrusion 29b for transmitting the rotation between the first rotating member 21 and the second rotating member 22 protrudes from the long hole 30b. This is provided to prevent interference with 33a. Therefore, if there is no possibility of interference, the notch 35 may be omitted.

上述のように構成される曲げ加工装置１２により、素材Ｗに曲げ加工を施す場合には、図１３の（Ａ）から（Ｊ）に示すように、第一の治具１３と第二の治具１４との回動に連動させて、第一の回動曲げ部１６及び第二の回動曲げ部１７を回動させる。該各回動曲げ部１６，１７は、前記両治具１３、１４の回動中心と偏心した第一の回転部材２１と第二の回転部材２２とを回転させることにより、図１３の（Ａ）から（Ｊ）に示すような軌跡を移動する。これにより、前記素材Ｗの３個所に同時に曲げ加工を施す事ができる。そして、例えば、前述したようなコイル８のコイルエンド部８，１０を得られる。 When bending the material W by the bending device 12 configured as described above, as shown in FIGS. 13A to 13J, the first jig 13 and the second jig are used. The first rotation bending portion 16 and the second rotation bending portion 17 are rotated in conjunction with the rotation with the tool 14. The rotating bending portions 16 and 17 rotate the first rotating member 21 and the second rotating member 22 which are eccentric with respect to the rotation centers of the jigs 13 and 14, respectively, so that FIG. To a trajectory as shown in (J). Thereby, it is possible to bend the three portions of the material W at the same time. For example, the coil end portions 8 and 10 of the coil 8 as described above can be obtained.

このように、本実施の形態によれば、３個所の曲げ加工を同時に行っているため、加工時間を短くできる。また、曲げ加工時に、素材Ｗが前記第一の治具１３及び第二の治具１４に対し変位しない（引き込みが生じない）ため、該素材Ｗと該両治具１３，１４との間で摺れ合いが生じることを防止でき、該素材Ｗに損傷が生じることを防止できる。また、曲げ加工時に該素材Ｗに引っ張り力が作用しないため、該素材Ｗの曲げ加工を正確に行える。該素材Ｗと前記各回動曲げ部１６，１７及び治具側曲げ部１９との間で摺れ合いが生じることも、確実に防止できる。 As described above, according to the present embodiment, since bending is performed at three locations simultaneously, the processing time can be shortened. Further, since the material W is not displaced with respect to the first jig 13 and the second jig 14 during the bending process (no pulling occurs), between the material W and both the jigs 13 and 14. The sliding can be prevented from occurring, and the material W can be prevented from being damaged. In addition, since the tensile force does not act on the material W during the bending process, the bending process of the material W can be performed accurately. It is possible to surely prevent the material W from being slid between the rotation bending portions 16 and 17 and the jig side bending portion 19.

特に、回転電機のコイルを構成する平角線の加工に使用した場合、複数個所の曲げ加工を短時間で精度良く行える。即ち、平角線は、丸線と異なり、曲げ加工の際に方向性を有するため、複数個所に同時に曲げ加工を施しにくい。これに対して、本実施の形態の曲げ加工装置１２によれば、このような平角線でも、容易に、且つ、短時間で精度良く曲げ加工を行える。また、曲げ加工の際に絶縁用のエナメル層を傷つけることがない為、良質な回転電機用コイルを得られる。 In particular, when used for processing a rectangular wire constituting a coil of a rotating electrical machine, bending at a plurality of locations can be performed with high accuracy in a short time. That is, unlike a round wire, a rectangular wire has directionality during bending, and therefore, it is difficult to perform bending at a plurality of locations simultaneously. On the other hand, according to the bending apparatus 12 of the present embodiment, even such a flat wire can be bent easily and accurately in a short time. Further, since the enamel layer for insulation is not damaged during bending, a good quality coil for a rotating electrical machine can be obtained.

なお、上述した実施の形態では、第一の治具１３と第二の治具１４との回動に連動して、第一の回転部材２１及び第二の回転部材２２を回動させる機構を、突起部２９ａ，２９ｂと長孔３０ａ，３０ｂとの係合によるカム機構により行っているが、前記機構は、別の周知のカム機構やリンク機構、歯車機構等としても良い。 In the above-described embodiment, a mechanism for rotating the first rotating member 21 and the second rotating member 22 in conjunction with the rotation of the first jig 13 and the second jig 14 is provided. Although the cam mechanism is formed by engaging the projections 29a and 29b with the long holes 30a and 30b, the mechanism may be another known cam mechanism, link mechanism, gear mechanism, or the like.

また、上述した実施の形態では、素材Ｗを３個所折り曲げる構成について説明したが、本発明の場合、回動曲げ部を備えた回転部材の数を増減させることにより、曲げ部の数を自由に設定できる。また、曲げる角度、曲げる方向等も、治具と回動曲げ部との連動機構を変更する（例えば、偏心位置を変える）等して、自由に設定可能である。 In the above-described embodiment, the configuration in which the material W is bent at three places has been described. However, in the case of the present invention, the number of bending portions can be freely set by increasing or decreasing the number of rotating members provided with the rotating bending portions. Can be set. Also, the bending angle, the bending direction, and the like can be freely set by changing the interlocking mechanism between the jig and the rotating bending portion (for example, changing the eccentric position).

更に、上述したような曲げ加工装置を複数連結させて、更に多くの曲げ加工を同時に行うことができる。即ち、本発明の場合、曲げ加工により素材が治具に対して変位しないため、複数の曲げ加工装置を連結して使用しても、曲げ加工時に素材を引っ張ることがなく、円滑に曲げ加工を行える。 Further, a plurality of bending apparatuses as described above can be connected to perform more bending processes simultaneously. That is, in the case of the present invention, since the material is not displaced with respect to the jig by bending, even if a plurality of bending devices are connected and used, the material is not pulled at the time of bending, and the bending can be performed smoothly. Yes.

１ステータ
２ステータコア
３マグネットワイヤ
４コイル
５スロット
６ティース
７一端面
８一端側コイルエンド部
９他端面
１０他端側コイルエンド部
１１スロット導体部
１２曲げ加工装置
１３第一の治具
１４第二の治具
１５回動軸
１６第一の回動曲げ部
１７第二の回動曲げ部
１８抑え部
１９治具側曲げ部
２０抑え面
２１第一の回転部材
２２第二の回転部材
２３ａ，２３ｂ薄肉部
２４第一の円筒部
２５円孔
２６第二の円筒部
２７第三の円筒部
２８ａ，２８ｂ円孔
２９ａ，２９ｂ突起部
３０ａ，３０ｂ長孔
３１切り欠き
３２ａ，３２ｂ厚肉部
３３ａ，３３ｂ保持部
３４保持面
３５切り欠き
Ｗ素材 DESCRIPTION OF SYMBOLS 1 Stator 2 Stator core 3 Magnet wire 4 Coil 5 Slot 6 Teeth 7 One end surface 8 One end side coil end part 9 Other end side 10 Other end side coil end part 11 Slot conductor part 12 Bending apparatus 13 First jig 14 Second Jig 15 Rotating shaft 16 First rotating bent part 17 Second rotating bent part 18 Suppressing part 19 Jig side bending part 20 Suppressing surface 21 First rotating member 22 Second rotating members 23a, 23b Thin wall Part 24 First cylindrical part 25 Circular hole 26 Second cylindrical part 27 Third cylindrical part 28a, 28b Circular hole 29a, 29b Protrusion part 30a, 30b Long hole 31 Notch 32a, 32b Thick part 33a, 33b Holding Part 34 Holding surface 35 Notch W Material

Claims

In a bending machine that performs bending at multiple locations on a given material,
A first jig and a second jig that are rotatably connected around a rotation axis;
Interlocking with the rotation of the first jig and the second jig, and rotating about each fulcrum, and a plurality of rotation bending parts for bending the material,
The first jig has a holding part that suppresses displacement of the material on the side opposite to the rotation direction, and a jig side bending part that bends the material by turning both the jigs,
The second jig has a holding portion that suppresses displacement of the material on the side opposite to the rotation direction,
The respective fulcrum of each of the rotating bending portions and the jig side bending portion are separated from the rotating shaft so that the material is not displaced with respect to the two jigs when bending the material. Place each offset,
A plurality of portions of the material are simultaneously bent by rotating each of the rotating bending portions in conjunction with the rotation of the first jig and the second jig. Bending device.

The pivot center of the pivot shaft is
An imaginary line passing through the same point where the jig side bending portion and the material are in contact before and after bending and the center of the jig side bending portion is a neutral line of the material. Start at the intersection,
From the starting point, the length of the neutral line of the material including the portion bent by the jig-side bending portion and each of the rotating bending portions at the time of bending is the state before bending of the material and after bending When the position on the neutral line, which is the same length as in the state of, is the reference point,
The distance to the reference point is the same before and after bending,
An angle formed by a straight line connecting the rotation center and the reference point before bending and a straight line connecting the rotation center and the reference point after bending is an angle between the first jig and the second jig. The bending apparatus according to claim 1, wherein the bending apparatus is defined to have an angle corresponding to a rotation angle with the tool.

Each fulcrum of each of the rotating bending parts is
An imaginary line passing through the same point where the jig side bending portion and the material are in contact before and after bending and the center of the jig side bending portion is a neutral line of the material. Start at the intersection,
An imaginary line passing through the same point where each of the rotating bent portions and the material are in contact before and after bending and the center of the rotating bent portion intersects the neutral line of the material. When each point is the end point,
The length of the neutral line between the start point and the end point is determined so that each of the rotating bent portions is arranged so that the length is the same before and after the bending process. The bending apparatus as described.

The bending apparatus according to claim 3, wherein the end point is a center on each neutral line of each bent portion of the material bent by each rotating bending portion after bending.

A plurality of rotating members that are arranged so as to overlap each other in the axial direction of the rotating shaft, and rotate about a position eccentric from the rotating shaft;
Each of the rotating members has the rotating bending portion, and interlocks with the rotation of the first jig and the second jig, and engages with each other so as to be rotatable around the respective fulcrum. The bending apparatus according to any one of claims 1 to 4, wherein:

The material has three bending points,
The first jig and the second jig are a rotation axis provided on the second jig on a first cylindrical portion concentric with the rotation axis provided on the first jig. Is connected to be pivotable by fitting a concentric circular hole,
The first jig is arranged by overlapping the second cylindrical portion and the third cylindrical portion in which the central axes are eccentric to the first cylindrical portion in the axial direction,
The first rotating member and the second rotating member, which are the rotating members, have circular holes concentric with the fulcrum of the rotating bending portions provided in the rotating member, respectively, in the second cylindrical portion and the third cylindrical portion. By being fitted, the second cylindrical part and the third cylindrical part are respectively supported rotatably.
The second jig and the first rotating member each have a protruding portion protruding in the axial direction,
Each of the first rotating member and the second rotating member has a concave groove or a long hole which is recessed or penetrates in the axial direction and is long in a direction inclined with respect to the circumferential direction,
By engaging each of the protrusions with the concave groove or the long hole, the first rotating member and the first jig are interlocked with the rotation of the first jig and the second jig. The bending apparatus according to claim 5, wherein the second rotating member is rotated.

The second rotating member has a notch having a circumferential length greater than a relative rotation amount of the first rotating member and the second rotating member, and is provided in the first rotating member. The bending apparatus according to claim 6, wherein the rotating bending portion is disposed in the notch.

The bending apparatus according to any one of claims 1 to 7, wherein the predetermined material is a rectangular wire having a rectangular cross section that forms a winding of a coil of a rotating electrical machine.